Boring and grinding tool.



Patented May15,1917.

.y kl .o j/ 4 1/ 0u. IMPI IIII a r ml.

srnfrns PATENT ortica.

ennemis H. sonoma, or ivrrnignarome MINNESOTA.

nome enemies? FOOL To all whomit may concern.-

Beit known that I Cinema H. Sonoma, a citizen of the United States', anda resident of Minneapolis, in the Acounty'of un and State of Minnesota,have invenb a new and Improved Boring llng and Grind Tool, of whichithefollowingds a full, clear,

Drawings.

. l gure 1 is al Sectional elevation of a 991,

of the character mentioned constructed and arranged in accordance withthe present inv vention;

' Fig. 2

.i larged scale, the section being taken as on thel line 2- 2 in Fig. 1;

Fig. 3 is across section en an enlarged scale, the section being takenthe line- 3--3 in Fig. 1;

Fig. 4 shows an end view of a mediiled form of'rthe invention permittingthe emplo ment 'of a boring tool;

ig. '5 is a sectional view taken as on the une 5-5 in Fig. i.

Desmipfim s 'shown in the drawings, .a iene late 9 is mvided with aseries of wanen-.aided bo ts| for clamping the hase 11 in xei relation.to said face plate. The bolts 10 sont end-opening slots 12. The slotsI12,v as

seen best in Fig. 2 of the drawings, are parallel to ermit the movementof the base 11 in one irecton on the face plate '9. This arrangementinsures the maintenance ofthe center of the stud shaft 13 in a pathradiating from the center of the face plate 9. The

4shaft 13 is rigidly mounted 'in the base 11,

and has at the extreme outer endthereof, a reduced portion 14 which=supporg the race collar 41li of a ball-bear1ng`cage.din-

- posedat the outer end of .the shaft-t9 sup ort the outer end of atubular man.u

dre V16.

The mandrel 16 above referred to is supported at its inner end by a ballbearing), one

collar 17 of the cage of said bearing eing isa cross section taken on aner1-- 2 of the drawings, the, @over speemcataon t Letters etsnt.-@eten-ted May 1.5, 191 '7. appnaauon med August 11., 191e. f 5mn-np,inet-7; u l

held ina cup formed fn .e fees 0f the base 11, and'another col ati; i"page being fxedly held in 'a reduced'enldmlgf said mandrel. Between thesaid collars, as the conventional construction, are held ne 'hearinghalls 20- 'rh entre an to f larger inamel tienes-er L.. e ee=fefna1ie1elof the seva-:1e en. een robin1- pulg@ on, Semie- ...ilf .ef-lid mandrel1s SUP Fwd 'by ...ill jl collar of wiich, ws'abgy@ supported on thereduced., en shaft 13. The other collar 21 is tted'lto the mandrel`to,form a raceway ffor the 'hei 5g, which'maintain the alinement of themaelfditb .the Shaft' liet-teen the ,inner sur. face .i the r. 1 thecute/r surface at the statt., .is ...9 Sntact between the seme.-

The mandrel4 156 is 15 19112 :25:

vendee flange 22 of, a clamp; plug u 23 extends through and ts. @entre pration in a grinding, wkeeldf, service is seated on the flange 22 ,andt@ @ggg of the mandrel 16. 'The wheel 24 is permailggtly eld on the plug23 by a spannei-mit en the nut 25 -1s removed, the

lwheel e from the plug 23 for repair m" In service, the maidr-.Ql il@i7' fvg; .from an intermediate source, the. mechanism being one whichpreferably ein: ploys a belt wluch passes around the pul- 'lay grown 32.The pulley crown 32 is in- `tegyaiiy1i on the mandrel 16, as shownin'Figl 'Il NYiIlgS-f w collarsl( and'1 ggd by a ring cover plate gg,bgg;

cured in position in the buse 1 Operation.

by screws d4.-

4The tool herein dilQed is especially designed for4 grinding and boringengine cylplete @d -1 supported at theinner end inders. The-cylindersare set preferably .on

a bed movable toward and away from the' ing the same. This arrangementhaving been established, the base '11. is moved on the plate 9 bymanipulating the feed screw 35 and thewrench head 2T thereof, 'to offsetthe center of the said base 11 and the shaft. 13 thereon, until theperiphery. ofthe wheel 211 engages the side or surface of the cyl.-inder to be -boredi- The running gear for the lathe for rotating thechuck, head is their started.. The power Kforrotating. the man-I drel 16is tur-ned on, and the wheel 21 is rapidly revolved thereby. 1f

The result of the dual operation is that the shaft 13, .mandrel 16, andwheel 24 are moved in a gyratory path aroundthe center ofthe lathechuekor plate 9, with 4the grind.

ing edge of.' the wheel 24 operating on thesurface of: thecylinder. Themember on which. the cylinder is mounted, is moved so that the wheel 24isfcariied lengthwise of the said cylinder. a

The-screw 35 is again manipulated to .in-

3-0' crease the eccentricityo the shaft 13 and;

Wheel 24, to increase what may be termed the feed of the. grindingwheel; While the cylinder is moved toward and away-from the base 11, thegrinding wheel. 211" continues to.

operate. The said wheel revolves at a speed relatively greater than thelathe head. .'lhe cylinder is nally ground to abore perfectly concentricwith.l the'plate 9 and .lathe head on which the same-1s mounted.

It will be noted that 'the mandrel 16..'is by a ball .bearing1ig`ldly-.l1eld'in4 the hase 11 and removed from the shaft 13. Thisarrangement gives'a more :solid and=less vibratory support for themandrel-16 anddissipates'or absorbs all vibration to whichthesamelmay1-besubjectL -Avoidance of-vibration 'in a'tool-of thecharacter herenr disclosed is of--major -impor-l tance, :and to this end4tlie'"1"nulley crown? 32'.

f bearing-therebyminimizingjthe=vibratory tendency inherent -to :thisclass. '-'Y 'lVhen the tool'is to-fbe usedV for'boring, thenbflse isdisposed in-closerproximity. 'te the said 111 'Sis moved by the screw 35to the 'posit-ion' concentric with the; plate 9-4'111d the lathe hen d on which the tool is mounted. The belt is' remoi-'d fromthe crown 32,5the plu U' "26 has' a 'square -holebroached through mwhich it is.principally designe it 'spanner'mht' 29 as' employed' -t'o hold the'tool 2S more firmly, this nut being adapted to provide threads toengage the threads on the reduced portion of the plug 26, as best shownin Fig. 5 of the drawings.

The mandrel 16 is then locked fixedly on 11i-'is locked 'bythe plate 30and the tool 28 is held in the manner above-described, the .rotationoi'said mandrel is regulated by the rate of rotation 'ofthe lathe headand et the ip lnte lconnectecl therewith.

Itis after the boring is completed, that the .tool 28 andrthc phig, 26.holdi ng the same are removed from the mandrel. 16,"and thegrindingwheel aandplug 2 2 holdingitare readj usted on the mandrel 16,The operating belt for the said mandrel is rengaged with the crown 32,and the latch plate 30 is with' drawn .tofits inactive osition shown inFig. 2 ot the drawings. en the tool is now offset fronr the center ofthe latl 1e,.tl xe same may be turned in the grinding o cperation for1.-..A tool as characterized comprising a :base plate; a mandrelrotatably mounted thereon; a bearing for said mandrel, art of saidbearing being permanentin .,sald base --plate and part 'of saidabearingbeing permanent in said mandrel; means for. a plylng powerEfor-,rotating said. mandrel, said) means embodying an inte ral.beltenga ngmember, said memberV eing dispose in juxtaposed relation-'tosaid bearing; and' a second. bearing -for said mandrel, part of saidbearing belng permanentlyconneeted with isaid Abase plateby means" of.a"structural '--n'1ember extending' therefrom through said mandrelf! i.2;.' lA-tool ascharacterized comprismg a l face plate; .a base movablymounted on said face -plate a Vbracket:shaft -rigidly mounted iusaid-base for :lextension l-perpe-ndi-eular to said lface' plate arotary .mandrel.circurnifolding said `:shaft ;"bea .ri'gs f oi fsa'idmanldrel-i for supporting 'the'opposite lends therevof, onei'fsaidbearings bein :mounted in said'base and the other-of'sai bearingsbefingmountedI thel outer end of said shaft; A"and,= meansirlgidlyfprovided on said mandrel `v-fo'rfrefvo'lvi'ng 'the sameon saidbearings, said y perpendicular relation to said face plate; a

rotary I'nandrel circumfolding said shaft in vspaced relation thereto,said mandrel having formed thereon adjacent said base a pulley memberand a plurality of bearings supporting the opposite ends of saidmandrel, said bearings having each 'a rotarymember anda stationarymember, the stationary member of one of said bearings 'being permanentlymounted in said base and the stationary member of the other of saidbearins being permanently mounted on said sha 4. A tool as characterizedcomprising a face plate adapted for centering on a lathe 60,1 of thllIntent may be obtained for ive cents each, by addressing the Gomnhlgonu'of Washington, D 0.

head; a base mounted on said plate and latera'lly movable thereon topositions eccentric thereto; means for movlng said base; a bracket shaftextending from said base in perpendicular relation to said face plate; arotary mandrel circumfolding said shaft in spaced relation thereto, saidmandrel having formed' thereon adjacent said base a pulley member; aplurality of bearings supporting the opposite ends of said mandrel, saidbearings having each a rotary member and a stationary member, thestationary member of one of said bearings being permanently mounted insaid base and the stationary member of the other of said bearings beingpermanently mounted on said shaft; an means for locking said base andface plate in service relation,

' CHARLES H. sonoma.

man.

